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Study on the Characteristics of Residual Film–Soil–Root Stubble Complex in Maize Stubble Fields of the Hexi Corridor and Establishment of a Discrete Element Model

Author

Listed:
  • Xiaolong Liu

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Ruijie Shi

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Wuyun Zhao

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Wei Sun

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Peiwen Li

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Hui Li

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Hua Zhang

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Jiuxin Wang

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Guanping Wang

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

  • Fei Dai

    (College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China)

Abstract

Plastic film mulching is one of the key technologies for improving agricultural productivity in arid and semi-arid regions. However, residual plastic film can severely disrupt the structure of the topsoil in farmland, leading to a decrease in crop yield. The Hexi Corridor, as the largest seed maize production base in the arid regions of Northwest China, is facing an increasingly prominent issue of residual plastic film recovery. This study designed experiments based on the typical maize planting model in the Hexi Corridor. A discrete element simulation model of the residual film–soil–root stubble complex was established using the Bonding-V2 model and API rapid filling technology. The reliability of the simulation model was verified through shear and puncture tests. The study revealed that the soil type in the Hexi Corridor is heavy sandy soil. The differences between the average maximum shear forces in the simulated and actual shear tests for root stubble–soil complexes at depths of 30 mm, 50 mm, and 100 mm were 4.8%, 6.4%, and 6.5%, respectively. Additionally, the differences in the average maximum vertical loading forces in the simulated and actual puncture tests for root stubble–soil complexes at depths of 50 mm and 100 mm were 6.4% and 12.37%, respectively. The small discrepancies between the simulated and actual values, along with the consistency of particle movement trends with real-world conditions, confirmed the reliability and accuracy of the simulation model. This indicates that the established discrete element flexible model can effectively represent actual field conditions, providing discrete element model parameters and theoretical support for optimizing the design of key components in China’s mechanized root stubble handling and residual film recovery machinery.

Suggested Citation

  • Xiaolong Liu & Ruijie Shi & Wuyun Zhao & Wei Sun & Peiwen Li & Hui Li & Hua Zhang & Jiuxin Wang & Guanping Wang & Fei Dai, 2024. "Study on the Characteristics of Residual Film–Soil–Root Stubble Complex in Maize Stubble Fields of the Hexi Corridor and Establishment of a Discrete Element Model," Agriculture, MDPI, vol. 14(9), pages 1-21, September.
  • Handle: RePEc:gam:jagris:v:14:y:2024:i:9:p:1542-:d:1473004
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    References listed on IDEAS

    as
    1. Thidar, Myint & Gong, Daozhi & Mei, Xurong & Gao, Lili & Li, Haoru & Hao, Weiping & Gu, Fengxue, 2020. "Mulching improved soil water, root distribution and yield of maize in the Loess Plateau of Northwest China," Agricultural Water Management, Elsevier, vol. 241(C).
    2. Chen, Pengpeng & Gu, Xiaobo & Li, Yuannong & Qiao, Linran & Li, Yupeng & Fang, Heng & Yin, Minhua & Zhou, Changming, 2022. "Effects of residual film on maize root distribution, yield and water use efficiency in Northwest China," Agricultural Water Management, Elsevier, vol. 260(C).
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